Grinding-mill.



No. 739,492. PATBNTED s591292; 1909.,

H.o.GRovEs.

' GRINDING MILL.

y APPLICATION FILED JULY 31,-1902. No MODEL'. 4 SHEETS-SHEET 2.V

nuenvoz H C. Groves, v

v Gtozncp Tal: xmms P51593 cu. wom-uma., mswms '1 c` PATENTED SEPT. 22,1903.

No. 739,492. H. c. GRoVBs.

GR- INDING' MILL. PPLIOATION FILED JULY 31; 1902.

4 SHEETS-SHEET 4. V

N0 MODEL.

No. verifies.

UNITED STAfif-Es resented september 22, 190e.

PATENT OFFICE.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 739,492, datedSeptember 22, 19`03.

I Application led July 31, 1902. Serial No. 117.889. (No model.)

.To a/ZZ whom it may concern.'

Beit known that I, HIRAM C. Gnovns, a citizen of the United States,residing at Woodward, in the county of Woodward'and Terri-f. `tory ofOklahoma, have invented certain new.v and useful Improvements in GrrindingMillsg 'and I do hereby declarethe following to' be 'a full, clear,and exact` description of 'thej invention, such as will enable others'skilled' in the art to which it appertains to make and use the same.

v My invention has relation to roller-mills;

and it consists of certain novel features of combination andconstruction of parts, of` which the following is a clear description ofthe preferred form or materialization which maybe `adopted in carryingout my ideas.

The object of my invention is to provide a mill comprising but a veryfew cooperating parts which may be very readily and cheaply manufacturedand quickly assembled each in its respective operative position.

A further object of my invention is to provide simple and eflicientmeans for adjusting the relationship of the several cooperating parts. r

Other, objects and advantages will be here'- inafter made clearlyapparent,'reference being had to the accompanying drawings, in Whichn fr Figure 1 is a perspective view of `my device in its operativeposition. YFig.'2 isa central vertical sectional view thereof. Fig. 3 isa sectional view as seen from the' dottedline :t a: in Fig. 2. Fig. 4 isa perspective view of a modified formof construction. Fig. 5 is acentral vertical sectional view thereof. Fig. 6 is a sectional view asseen from the dotted line 'y y in Fig. 5, and Fig. 7 is a perspectiveview of one of the crushing-rollers.

In order to fully set forth the details of my invention and the partsdeemed necessary to coperate therewith, numerals will be employed, thesame numeral referringk to a similar' part throughout the severalviews,and of which-- l represents suitable 'standards or supports, the upperends of which are provided with suitable bearings 2, in which atubularshaft 3 finds bearings. Securely attached to the shaft 3 or formedintegrally therewith is a central roller 4, said roller being providedat either end with suitable teeth 5, the object of which will behereinafter. more fully stated. Adjacent to one end of the roller 4 Ihave provided suitable orifices or grain-outlets 6,

through `which the grain passes from the" tubular shaft 3 to the outerside of the central roller 4,' from whence it drops loosely betweenrollers 8onto the inner surface of casing 12, where it is crushed.

In order toprevent the grain from passing on through-the'tubular shaft3, I provide a' I Y bushing 7, adapted to snugly fit the bore of saidshaft 3.'and to be located immediately adjacent tothe openings 6, sothatthe flow of the grain'is retarded at this point and caused topassthrough the said openings 6.

. The bushing 7 is v'also provided with a longitudinal orifice, so thatshould any foreign substances, such as pieces of corncob or the like, beleft in thev grain being ground and too large to pass through theorifices 6 they will vbe permitted to pass through the larger orilice inthe bushing 7 and thrown out at the lower end of th'eetubular shaft 3.

Spaced atsuitable distances around the f a;

periphery of the roller 4 are crushing-rolls 8, said rolls havingsuitable bores or sockets 9 at eitherlend thereof, adapted to receiveand be caused to revolve by the rollerA 4.

' In order to keep the crushing-rolls 8 spaced properlyQI have providedrings 10', said rings carrying suitablestuds'or teethf11,2which are alsoadaptedto take into the sockets 9 in the crushing-rolls 8. Byfthis meansthe crushing-rolls'are caused to travel around the peripheryof theinnerroller 4 and at the same time are 'causedto rotate.' l Surrounding thecrushing-rolls 8 between the annular rings 10 is a lsuitable housing 12,said housing being composed of two or more sections, so that the grainmay be crushed to different degrees of neness by' adjusting the saidhousing and lining closer to or farther from the said crushing-rolls 8.To accomplish this result, I have provided suitable vears 14 at dierentpoints upon the sections of the housing 12,through which take theadjustingscrews 15,` so that when it is desired to crush the grain finerthe ends of the sections 12 are drawn closer together, and vice versakwhen `it is desired to crush the grain coa-rse. The

by the teeth 5, carried IOO wearing upon the several parts may also beicompensated for in this way. In order to impart motion to the casing l2,I have attached thereto a suitable belt-wheel 16, said wheel beingconcentrically located around the said housing 12, while motion isimparted to the tubular shaft 3 through the medium of the belt-wheel 17.The grain is fed into the tubular shaft 3through a suitable hopper 18.One of the standards 1 is longer than the other, so that the machinewill rest in a slanting position, thereby causing the grain to traveltoward the openings 6 in the tubular shaft 3 and inner roller 4. It alsocauses the crushed grain to travel from one end of the housing 12 to theopposite end. The rings 10 are caused to travel with the housing 12 bysuitable bars 19, said bars being held to the housing by bolts 20 andthe ends of said bars 19 entering suitable clips 2l,securely attached tothe rings 10, thus making said rings 10 practically rigid with respectto the housing 12.

By crossing one of the belts leading tothe pulleys 16 and 17 the housing12 and the tubular shaft 3, carrying the inner roller 4, are caused totravel in opposite directions, and by having the said belt-wheels 16 and17 of dierent size the housing and tubular shaft are caused to travel atdierent speeds, the diderence in speed being regulated by the differencein size of the pulleys. If it is so desired, the bars 19 may be entirelydispensed with, allowing the rings 10 to travel independently of thehousing 12. It will also be seen that the tubular shaft 3, carrying theinner roller 4, may be securely locked by any suitable means within thebearings 2,and thus prevented from revolving, so that the capacity ofthe mill will be greatly reduced, as by having said shaft held rigid thecasing 12 imparts all the motion to the crushing-rolls 8 and wouldnecessarily cause them to travel much slower. If so desired, .the casing12 and the tubular shaft 3 may be revolved in the same direction, onenecessarily traveling faster than the other. In Figs. 4 to 7, inclusive,I have shown a modified form of construction, wherein the inner roll 4and the crushing-rolls 8 are cone-shaped, the housing 12 also beingcone-shaped. This construction is provided with but one annular ring 10,the said ring being provided with a downwardly-eXtending flange 22, saidiiange being adapted to bear against one end ofthe crushing-rolls 8.

When it is desired to grade the grain being ground, the housing 12 ismoved laterally upon the crushing-rolls 8 through the'medium of theadjusting-bolts 23, attached to one edge of the housing 12, and suitableclips 24, attached to the periphery of the annular ring 10, thedownwardly-extending flange 22 serving to hold the annular ring l0 inplace, thus causing the housing 12 to move inwardly or outwardly, asdesired. In other respects this construction is operatedin the samemanner as the construction Vpreviously described, and it is thereforenot deemed necessary to describe the operation of this device morefully. In operation the grain is placed in the hopper or receptacle 18,from whence it passes into the tubular shaft 3, passing thence throughthe orifices 6, where it is crushed by the rolls 8 while passing fromone end of the housing 12 to the opposite end.

It will therefore be obvious that my mill will be found to be verystrong and durable in character and that since the various parts may bemanufactured so as to vbe readily interchangeable in different millsvarious required supplies may be readily obtainable for the purpose ofreplacement and repair as from time to time such action may be foundnecessary. Inasm uch as the casing normally rotates in an oppositedirection from the rotation of the centrally-disposed roller, greatspeed may be attained by the application of a minimum amount of power,the roller f1 being disposed in the exact central portion of the casingand the plurality of rollers S adapted to move in a concentric pathwithin the casing and all traveling in an opposite direction from therotation of the central roller. The grain introduced within my improvedgrinding-mill will be reliably and quickly acted upon and crushed anddisintegrated to the desired degree of neness, inasmuch as I am enabledto produce a very finely-ground product or a coarse feed in accordancewith the adjustment which I have placed upon the several rollers byreason of the change of relationship between said parts and the casing.

It will be understood that the various parts of my invention may bemodified in construction as desired, inasmuch as certain changes ormodifications maybe made Without departn ing from the spirit or scope ofmy invention, and I therefore wish to comprehend all substitutes andequivalents of the construction I have herein described and illustrated.

Believing that the advantages and manner of using my improved millingapparatus have thus been made clearly apparent from the foregoingspecification, considered in connection with the accompanying drawings,further description is deemed unnecessary.

What I claim as new, and desire to secure by Letters Patent, is

1. In a grinding-mill, the combination with a suitable casing of aroller concentrically mounted therein and a plurality of coperatin grollers ydisposed in the annular space between the central roller andthe casing and means to adjust the relative position of said partswhereby the grain may be ground to any degree of fineness and additionalmeans to rotate said central roller and casin g all coinbinedsubstantially as specified andfor the purpose set forth.

2. In a grinding-mill, the combination with a suitable casing, of aroller concentrically mounted therein; teeth carried by said roller;

IIO

a plurality of coperating rollers disposed in the annular space betweenthe central roller and the casing; sockets carried by said coperatingrollers adapted to receive said teeth, whereby the said coperatingrollers will be positively rotated as set forth.

3. In a grinding-mill, the combination with a suitable casing, of ahollow shaft; a roller xed to said shaft; cooperating rollersl disposedin the annular space between the central roller and the casing, andmeans to rotate said cooperating rollers substantially as set forth.

4. A grinding-mill of the class described, consisting of a suitablecasing; a belt-wheel secured to said casing; a ring at each end ofl saidcasing; studs secured to the inner faces of said rings and bars securedto the said casing` adapted to hold said annularrings in place,v incombination with a centrally-dis#` posed roller anda plurality ofcoperating rollers disposed in the annular space between the centralroller and the casing, substantially as and ,for the purpose set forth.

5. In a grinding-mill, a central roller; a plurali ty of co peratin grollers surrounding said central rollerfand intermeshing therewith 'atsuitable points; rings having studs adapted to intermesh with thecoperating rollers A ing means being adapted to permit foreign.

substances in the grain to pass 'onward through said shaft, as and forthe purpose set forth.v

In testimony whereof I affix my signature in presence of two witnesses.l HIRAM C. GROVES. Witnesses:

W. H. N EwooMB, N. B. NEwooMB.

